Means for positioning lamps



E. A. EVERETT.

MEANS FOR POSITIONING LAMPS. APPLICATION-FILEDIUNEIH,1919.

1,388,634 Patented Aug. 23,1921.

PATENT OFFICE.

EDWARD A. EVERETT, OF NEW YORK, N. Y.

MEANS FOR POSITIONING LAMPS.

Specification of Letters Patent.

Patented Aug. 23, 1921.

Application filed June 14, 1919. Serial No. 304,260.

To all whom it may concern Be it known that I, EDWARD A. Evnnn'r'r, a citizen of the United States, and. resident oi. New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Means for Positioning Lamps, of which the following is a specification.

This invention relates to lamps and the1r housings and more particularly to the means employed. for adjusting the lamp within the housing and has for an object a simple and effective means for adjusting the lamp relative to a lens whereby the soui'ceof light is maintained in the focus 01": said lens. These objects are obtained by the construction shown in the accompanying drawings in which Flgure 1 shows a side elevation, partly in section, Fig. 2 is an elevation looking through the door of the lamp housing, Fig. 3 1s a plan view and Fig. 4: is a detail of one or the parts.

The type oi lamp housing here shown is used it'or outdoor service such as railway signals to illuminate the semaphore light and the purpose is to use a low voltage electric light as the source of illumination. The illumination is thus confined to a small filament and for proper results it is essential. that this filament be accurately focused relative to the lens in the lamp housing. When lamps are changed an adjustment is necessary for this purpose and it is the object of the present invention to provide means that will facilitate this adjustment. The lamp C is supported by the arm B secured to the block A and placed in the lamp housing 51 so as to bring the filament 1.8 into the line of focus w7 of a lens secured by the lens ring 52. The block A is placed in the lamp housing through the door and is held in position on three sides by the spacers ll, 42 and 43. It is locked in position by the screw 31 which engages the spacer 41 and is thus fixed relative to the housing 51.

An opening 35 beveled from the top is provided in block A and the arm B extends over this opening and is secured by the thumb nut 12 and the bolt 11 to the block. This bolt engages the slot 13 in arm B so that the latter may be moved to the extent of the slot with a corresponding movement of the lamp. The lamp socket 24 is fitted with a brass tube 15 through which the electrical connections may be made. This tube is fitted into the opening 14. in arm B and secured in position by the clamping nut 16. The binding posts 19 may be used as terminals for the electrical connections.

When a lamp 17 is replaced, the new lamp may not position the filament to correspond with the old one. The door opening of the lamp housing is comparatively small and is represented in Figs. 1 and 2 by the char acters 53 and 54, it is very desirable therefore that all the adjustments be made with out placing the hand inside the lamp housing to release any part. In the present arrangement this can be done, first by securing the locking screw 31, then releasing thumb nut 12 and moving the lamp stem Within the area 35 to the position desired and securing the thumb nut again by the fingers and finally, releasing the clamping nut 16 with a screw driver through the door opening, adjusting the lamp to the required height and tightening this screw again.

The features embodied in this invention are of considerable practical importance when lamps have to. be adjusted at the top of a semaphore mastand the operator has only one hand available for this purpose.

Having thus described my invention, I claim:

In combination a lamp and socket, a lamp housing having an opening, a loose block placed in said lamp housing and locked in position by a screw, a horizontal arm secured to said block by a. thumb screw and capable of movement in a horizontal plane, said arm having jaws oflset at a right angle and having a clamping screw, said lamp socket clamped to said arm by said clamping screw, said thumb screw located opposite said opening, the screws for locking said block and clamping said socket being in a direct line with said opening.

Signed at New York, in the count New York and State of New York, 11th, A. 1919.

EDWARD A. EVERETT. 

